College boyfriend

I need advice, my boyfriend and I just started our relationship even tho we've liked eachother for a while. We've just been really hesitant because he's a senior and I'm a sophomore in hs. And there's no problem with that and our parents fully support us. But the problem is that he's going to college 2 hrs away and I'll still be in hs. We just don't want to get too attached even tho we really like eachother, because he doesn't want me to end up hurt in August when he leaves. We don't know if we would stay together throughout college until I get there... Idk I'm just upset and need some advice and stories